Finished product separation device of die-cutting machine

Abstract

This invention relates to the field of post-die-cutting processing technology, specifically to a finished product separation device for die-cutting, including a worktable and an ejector pin structure, a conveying structure, an automatic palletizing structure, and a waste roll structure mounted thereon. The ejector pin structure includes horizontally adjustable ejector pins, each with several pin columns, and a universal ball joint at the lower end of each pin column. A discharge plate with discharge holes is provided between the ejector pin structure and the conveying structure. The ejector pin structure pushes the finished product from the discharge holes onto the conveying structure, which then conveys it to the automatic palletizing structure for palletizing. The beneficial effects of this invention are: by combining the multi-point adjustable ejector pins with the universal ball joint structure and using the clamping and transporting mechanism of the conveying structure, it solves the problems of incomplete product separation and inconsistent posture caused by traditional single-point pushing, and by combining with the automatic palletizing structure, it achieves high-integrity separation and efficient automatic palletizing of the finished product.

Description

Technical Field

[0001] This invention relates to the field of post-die-cutting processing technology, specifically to a finished product separation device for die-cutting machines. Background Technology

[0002] Die-cutting machines, as key processing equipment in industries such as packaging, printing, and electronics, are mainly used to die-cut raw materials such as cardboard, film, and metal foil into finished products of predetermined shapes. After die-cutting, the finished products are usually connected to the waste wire mesh frame that supports them. Post-processing equipment is needed to separate the finished products from the waste, and then automatically stack the separated finished products neatly for subsequent storage, transportation, and secondary processing. Therefore, the integrity and consistency of the separated finished products directly determine the product qualification rate and subsequent processing efficiency, representing the core challenge of die-cutting post-processing technology.

[0003] Chinese utility model patent CN217414259U discloses a waste separation device for a die-cutting machine, including a worktable with a conveyor belt. A cutting mechanism and a waste roll are arranged above the conveyor belt. The device also includes a feeding mechanism and a separation mechanism. The feeding mechanism and separation mechanism are located above the conveyor belt between the cutting mechanism and the waste roll. The feeding mechanism includes a push rod frame and a row of push rods arranged in a front-back direction. All the push rods are fixed on the push rod frame. The push rod frame is fixedly connected to the die-cutting head of the cutting mechanism. When the die-cutting head moves up and down, it drives the push rods to move up and down, thereby pushing the finished product down and neatly dropping it onto the conveyor belt, thus achieving the separation of finished product and waste.

[0004] However, the ejector structure of this device applies pressure to each finished product at a single point. If there is excess glue on the edge of the product or the die-cut is incomplete, causing the product to stick to the scrap edge, it is easy for one side of the finished product to fall off after ejection while the other side remains stuck to the scrap, resulting in incomplete separation of the finished product and the scrap. After ejection, the finished product falls to the conveyor belt in a free-fall manner, and the landing position of the finished product is different from the front and back of the finished product, which affects the subsequent finished product collection process and restricts the overall production efficiency. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a finished product separation device for die-cutting machines that improves the integrity, posture consistency, and equipment adaptability of die-cut finished product separation.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a finished product separation device for a die-cutting machine, comprising a worktable, a conveying structure on the worktable for conveying finished products, an ejector pin structure disposed above the conveying structure for separating finished products from the material strip, an automatic stacking structure for stacking finished products, and a waste recycling structure. The ejector pin structure includes ejector pins, each ejector pin including an ejector pin seat and a plurality of ejector pin columns. The lower end of the ejector pin seat is provided with a plurality of mounting grooves corresponding to the ejector pin columns. The plurality of mounting grooves are circumferentially distributed on the ejector pin seat. The upper end of each ejector pin column is installed in the corresponding mounting groove, and the position of the ejector pin column in the mounting groove can be adjusted horizontally. The lower end of each ejector pin column is provided with a universal ball structure for pushing the finished product.

[0007] The above technical solution replaces the traditional single ejector rod with several ejector pins distributed around the finished product. Force is applied simultaneously or as needed from multiple edge points of the finished product, avoiding the phenomenon of one-sided adhesion or incomplete separation caused by eccentric force application at a single point. The specific working principle is as follows: First, according to the shape of the finished product, each ejector pin is installed at a position that can push the finished product but does not contact the waste material, maximizing the contact surface formed by the lower ends of all ejector pins. When the material belt reaches below the ejector pin structure, the ejector pins move downwards, and the universal ball contacts the surface of the finished product and presses it down to detach it from the material belt. The ejector pins continue downwards, and the universal ball remains in contact with the finished product. When the finished product falls onto the conveyor belt, the universal ball and the conveyor belt together hold the finished product to prevent it from moving around due to machine vibration. The conveyor belt moves the finished product forward, and the universal ball rotates at the lower end of the ejector pins to prevent the finished product from getting stuck. Then, the ejector pins move upwards, and the finished product is sent by the conveyor structure to the stacking structure for automatic stacking. The waste material is then rolled into a waste roll by the waste rolling structure. In this technical solution, the ejector pins consistently act on the finished product, preventing the randomness of the landing point and inconsistent orientation caused by free fall. Operators can flexibly configure the number and distribution of the ejector pins' points of action according to the separation requirements of finished products of different sizes and shapes, which helps improve the versatility of the equipment and production quality.

[0008] The above technical solution can be further configured as follows: an adjustment structure is provided between the upper end of the ejector pin and the ejector pin seat. The adjustment structure includes an adjustment unit and a first spring. The adjustment unit includes a knob and a screw that passes horizontally through the upper end of the ejector pin. One end of the screw is fixedly connected to the knob, and the other end of the screw is threadedly connected to the ejector pin seat. The first spring is sleeved on the outside of the screw, and both ends of the first spring abut against the ejector pin and the ejector pin seat, respectively. The knob is provided with a locking component for locking or unlocking the adjustment unit and the ejector pin.

[0009] Using the above technical solution, the adjustment structure provides independent and precise horizontal adjustment for each ejector pin. Its technical principle is as follows: the knob, screw, and ejector seat form a threaded pair; rotating the knob screws the screw into or out of the ejector seat. The screw has a thread at one end connected to the ejector seat, while the end passing through the ejector pin is smooth. The ejector pin is pressed against the ejector seat by a first spring. When the knob is rotated to allow the screw to penetrate deeper into the ejector seat, one side of the knob pushes the ejector pin, compressing the first spring and thus pushing the ejector pin deeper into the ejector seat. Conversely, rotating the knob in the opposite direction causes the ejector pin to move away from the central axis of the ejector seat under the restoring force of the first spring. This technical solution achieves stepless continuous adjustment of the ejector pin on the horizontal plane, adapting to different finished product shapes and ensuring an ideal separation force distribution. The locking component is used to fix the relative position after adjustment, preventing adjustment failure due to vibration during high-speed reciprocating motion.

[0010] The above technical solution can be further configured as follows: the locking assembly includes a plurality of locking holes provided on the ejector pin, a mounting cavity provided on the knob, a locking member installed in the mounting cavity, and a second spring provided between the locking member and the adjustment unit. The locking member includes a locking member body, an operating part, and a limiting part. The mounting cavity is provided with a limiting hole corresponding to the limiting part. The limiting part is partially exposed from the limiting hole and extends into the locking hole to limit the adjustment unit. The mounting cavity is provided with an operating hole corresponding to the position of the operating part. The operating part is partially exposed from the operating hole. The second spring provides a pre-tightening force to push the limiting part out of the limiting hole and into the locking hole. Pressing the operating part can separate the limiting part from the locking hole.

[0011] Using the above technical solution, the locking assembly provides a fast and reliable locking and unlocking mechanism. In its natural state, the preload of the second spring pushes the locking member outward, causing the limiting part to pass through the limiting hole on the knob and embed into the locking hole of the ejector pin, forming a mechanical interlock. This state temporarily fixes the ejector pin and the adjustment unit together, preventing the knob from rotating accidentally, thereby locking the ejector pin in the horizontal position in the mounting groove. The working principle of this technical solution is as follows: When readjustment is required, the operator presses the exposed operating part, overcoming the force of the second spring, driving the locking member to move inward as a whole, causing its limiting part to retract completely from the locking hole of the ejector pin into the mounting cavity of the knob. At this time, the lock between the ejector pin and the knob is released, and the knob can be freely adjusted by rotating it. After releasing the operating part, under the action of the second spring, the limiting part will pop out again, and at this time the limiting part will automatically spring into the other locking hole of the ejector pin to achieve relocking; if it is not aligned, the pressing state can be maintained for adjustment until the limiting part is aligned with the other locking hole and then released. This technical solution enables convenient operation of pressing, adjusting, and releasing the lock with just one hand, simplifying the process of coordinating the adjustment of multiple pins and improving debugging efficiency. In this solution, the knob can be designed with a directional feature to more intuitively indicate the position adjusted by the knob, making it easier for other pins to be adjusted to the same position, further improving adjustment efficiency.

[0012] The above technical solution can be further configured as follows: the ejector pin structure further includes an ejector pin reciprocating frame and an ejector pin sliding frame. The ejector pin reciprocating frame is provided with a first adjustment groove, and the ejector pin sliding frame is slidably installed on the first adjustment groove. The ejector pin sliding frame is fixed to the first adjustment groove by providing a first locking member. The ejector pin sliding frame is provided with a second adjustment groove, and the ejector pin is slidably disposed on the second adjustment groove, with the sliding direction perpendicular to the sliding direction of the ejector pin sliding frame. The ejector pin is fixed to the second adjustment groove by providing a second locking member.

[0013] By employing the above technical solution, the ejector pin is given degrees of freedom and precise positioning capability in two vertical directions within the horizontal plane through a position adjustment mechanism. The ejector pin sliding frame slides along the first adjustment groove on the ejector pin reciprocating frame, and the ejector pin as a whole can slide along a direction perpendicular to the sliding direction on the second adjustment groove. Through these two mutually perpendicular sliding pairs, the ejector pin can be precisely positioned to any point within the working area corresponding to a specific die-cut product position. The first and second locking components (usually bolts, screws, etc.) are used to secure the sliding components after adjustment, ensuring their positional stability under high-speed reciprocating impact. When changing to a mold with different layouts but the same shape, this solution only requires loosening the first and second locking components, moving the ejector pin as a whole to the vicinity of the new product area, and then locking it again.

[0014] The above technical solution can be further configured as follows: the ejector pin structure is connected to a reciprocating assembly that drives the ejector pin to move up and down reciprocally. The reciprocating assembly includes ejector pin brackets fixedly installed on both sides of the ejector pin structure on the worktable and a reciprocating cylinder for driving the ejector pin structure to move up and down reciprocally. The ejector pin brackets are provided with reciprocating grooves opened in the vertical direction. Connecting rods are provided on both sides of the ejector pin reciprocating frame corresponding to the reciprocating grooves. The reciprocating cylinder is installed above the ejector pin brackets. The reciprocating cylinder is provided with a piston rod. The connecting rod is fixedly connected to the piston rod. When the cylinder is working, the piston rod drives the connecting rod to move up and down reciprocally in the reciprocating groove.

[0015] Using the above technical solution, the reciprocating assembly provides the power source and guidance for the separation action of the ejector pin structure. The reciprocating cylinder, as the driving element, precisely controls the extension and retraction of the piston rod, thereby driving the connecting rod, which is fixed to the piston rod, to complete a regular up-and-down reciprocating motion. The vertical reciprocating groove on the ejector pin bracket and the connecting rod form a sliding pair, guiding the ejector pin reciprocating frame. It strictly limits the movement trajectory of the connecting rod and even the entire ejector pin structure, ensuring that it moves only in the vertical direction, eliminating the possibility of lateral swaying or deflection, and ensuring that each time the ejector pin is pressed down, all ejector pins can act precisely on the finished product in a direction perpendicular to the worktable surface, avoiding the finished product separating first on one side due to oblique downward movement, which would make the separation posture difficult to control.

[0016] The above technical solution can be further configured as follows: the universal ball structure includes a column at the lower end of the ejector pin, a large ball, several small balls, and an end cap. The lower end of the column is provided with a hemispherical receiving groove. The inner wall of the receiving groove is provided with an annular small ball groove. Several small balls are received in the small ball groove. The large ball is received in the receiving groove and supported by the small balls. The end cap is threaded to the lower end of the column. The end cap is provided with a large ball hole, and the large ball is partially exposed from the large ball hole.

[0017] Using the above technical solution, when the ejector pin pushes the finished product away from the waste and presses it down, to ensure that the finished product does not fall freely, the large ball must press the finished product against the surface of the conveyor belt. At this time, since the conveyor belt runs continuously without stopping, if the end of the ejector pin is a rigid tip, the finished product will generate significant sliding friction with it during transport. The universal ball structure converts sliding friction into rolling friction, allowing the finished product to travel a certain distance while being held between the two. The working principle of this technical solution is as follows: When the finished product is driven by the conveyor belt and generates horizontal displacement, the frictional force acting on the surface of the finished product will drive the large ball in contact with it to rotate around its center. The rotation of the large ball is supported by the small balls around it, which roll simultaneously within their own small ball grooves, thus allowing the large ball to rotate smoothly in the column's receiving groove. It should be noted that the end cap is threaded to the lower end of the column and has a large ball hole. This large ball hole only allows the large ball to partially protrude and does not allow it to fall out from under the end cap, that is, the end cap limits the rotation of the large ball while it is moving.

[0018] The above technical solution can be further configured as follows: a blanking plate is provided between the ejector pin structure and the conveying structure, and the blanking plate is provided with blanking holes adapted to the shape of the finished product; the blanking plate is provided with positioning grooves at the four corners, and the worktable is provided with positioning columns corresponding to the positioning grooves, and the positioning columns are locked in the positioning grooves to limit the blanking plate.

[0019] Using the above technical solution, this positioning mechanism enables rapid, precise, and repeatable installation and positioning of the blanking plate on the worktable. Positioning columns are fixed to the worktable, forming standard reference points. The positioning grooves at the four corners of the blanking plate and these positioning columns form a "pin-hole" fit. During installation, simply align the positioning grooves of the blanking plate with the positioning columns, and the blanking plate is restricted to all degrees of freedom in the horizontal plane, unable to move or rotate. When it is necessary to change to produce finished products of different shapes, the operator only needs to lift the old blanking plate to remove it from the positioning columns, replace it with a blanking plate with corresponding new blanking holes, and fit its groove into the positioning columns. The replacement process is quick and ensures consistent positioning each time.

[0020] The above technical solution can be further configured as follows: the conveying structure includes a lower conveyor belt, an upper conveyor belt, and a guide plate for guiding the finished product. The lower conveyor belt is located below the ejector pin structure and is used to receive the falling finished product. The upper conveyor belt is located above the lower conveyor belt. A clamping gap is formed between the upper and lower conveyor belts for clamping and conveying the finished product. The guide plate is located at the outlet end of the clamping gap and extends downward to the automatic palletizing structure.

[0021] Using the above technical solution, the lower conveyor belt receives finished products that have fallen from the discharge hole and are already in the correct orientation. The upper and lower conveyor belts operate synchronously, and the clamping gap between them provides a gentle clamping force to the finished products. The working principle of this technical solution is as follows: when the finished product enters the clamping gap, it is immediately constrained within the conveyor plane and is smoothly conveyed forward with the movement of the conveyor belt, preventing displacement of the finished product due to machine vibration on the conveyor belt surface. After being released from clamping, the finished product at the end of the lower conveyor belt slides along the downward-extending guide plate into the automatic palletizing structure.

[0022] The above technical solution can be further configured as follows: the automatic palletizing structure includes a stacking box and a pushing assembly. The stacking box extends along the conveying direction of the conveying structure. The pushing assembly includes a pushing motor, a pushing active roller connected to the output shaft of the pushing motor, a pushing driven roller for supporting the pushing belt, and a pushing belt wound around the pushing active roller and the pushing driven roller. The bottom of the stacking box is provided with a guide groove. Several elastic pushing plates are equidistantly distributed on the surface of the pushing belt along the direction of the guide groove. The elastic pushing plates are used to push the finished product to move in the stacking box. Several elastic pushing plates can move in the guide groove under the drive of the pushing belt. When the elastic pushing plate is obstructed, it passively deforms to avoid the obstacle and returns to its original state after the obstacle avoidance is completed.

[0023] Using the above technical solution, the automatic and compact stacking of finished products is achieved through a continuous and flexible pushing mechanism. The stacking box is used to accommodate finished products that slide off the guide plate. The working principle of the pushing assembly is as follows: The pushing motor drives the active roller, which drives the annular pushing belt to rotate in a cycle. Multiple elastic pushing plates fixed on the surface of the belt move accordingly. The guide groove at the bottom of the stacking box allows the elastic pushing plates to pass through and move along it. When a finished product slides into the entrance of the stacking box, a subsequent elastic pushing plate will contact its side and push the finished product forward along the stacking box under the drive of the belt. When the finished product is pushed to contact the finished product already stacked in front, the resistance of the elastic pushing plate increases. At this time, the flexible elastic pushing plate (preferably made of elastically deformable materials such as rubber and plastic) will bend and deform under continuous driving force, thereby bypassing the currently blocked finished product. After the pushing plate passes the finished product, it will maintain its deformed shape and slide past all the finished products that have been stacked, then leave the guide groove and return to its original shape, ready to push the next arriving finished product. After the elastic pusher plate deforms, the pushing force on the finished products is lost. Newly stacked finished products may tip over due to vibration, gravity, or other factors. At this point, the next pusher plate connects with the current pusher plate to push the finished products or push the next finished product to stack and stabilize the already stacked finished products. This allows the finished products to be arranged closely one by one, forming a neat stack shape, achieving efficient automatic stacking. It should be noted that the worktable is equipped with slide rails, and the stacking boxes are correspondingly equipped with sliding grooves to facilitate the installation and removal of the stacking boxes.

[0024] The above technical solution can be further configured as follows: the waste roll structure includes a reversing roller and a winding roller. The reversing roller is used to change the direction of the waste roll from horizontal to tangential to the winding roller. The winding roller is connected to a winding motor that drives the winding roller to rotate. The winding roller is located above the upper conveyor belt.

[0025] Using the above technical solution, after the finished product is separated, the waste strip travels along the upper surface of the blanking plate to the bottom of the reversing roller. After passing through the gap under the reversing roller, the waste strip changes direction from horizontal to vertical or inclined and travels upward. The winding motor drives the winding roller to rotate and wind the waste strip into a waste roll.

[0026] The present invention has at least the following beneficial effects:

[0027] 1. By applying force simultaneously from multiple edge points of the finished product through several independently adjustable ejector pins, the problem of one-sided adhesion and incomplete separation of the finished product, which is easily caused by traditional single-point ejection, is avoided. The omnidirectional ball structure transforms sliding friction into rolling friction, which can prevent scratches on the surface of the finished product during the instantaneous conveying process at the lowest point of ejection, ensuring that the finished product is separated without damage, with high separation integrity and stable product quality.

[0028] 2. The ejector pin column can be infinitely adjusted horizontally, and the ejector pin can move in the horizontal plane. The blanking plate adopts the positioning column and groove cooperation to realize quick positioning and replacement. It can flexibly adapt to die-cut products of different sizes, shapes and distributions, shorten the debugging and preparation time when changing product models, and improve the equipment versatility and production efficiency.

[0029] 3. During the pressing process, the ejector pin maintains contact with the finished product through the universal ball. After the pressing is completed, it still maintains clamping for a short period of time. Combined with the clamping gap formed by the upper and lower conveyor belts, it effectively prevents the finished product from flipping, shifting or falling freely during separation and transportation, ensuring that the finished product enters the palletizing stage in a consistent and stable posture.

[0030] 4. The automatic palletizing structure adopts a circulating pusher belt with elastic pusher plates. It can automatically deform and avoid obstacles during the pushing process, and then return to its original shape to continue pushing the subsequent finished products. This achieves automatic, continuous and compact stacking of finished products with high palletizing neatness. No manual intervention is required and the processing efficiency is high. The stack extension direction is set along the conveyor belt transportation direction. The length of a single stack is long and the stack length is not restricted by the height of the discharge port, resulting in good space utilization.

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the finished product separation device of the die-cutting machine of the present invention;

[0033] Figure 2 This is an enlarged schematic diagram of the ejector pin in this invention;

[0034] Figure 3 This is a schematic diagram of the exploded structure of the ejector pin in this invention;

[0035] Figure 4This is a cross-sectional schematic diagram of the adjustment unit structure in this invention;

[0036] Figure 5 This is a cross-sectional schematic diagram of the universal ball structure in this invention;

[0037] Figure 6 This is an enlarged view of the locking hole structure of the ejector pin in this invention;

[0038] Figure 7 This is a schematic diagram of the overall structure of the ejector pin in this invention;

[0039] Figure 8 This is a schematic diagram of the overall conveying mechanism and waste roll structure in this invention;

[0040] Figure 9 This is a schematic diagram of the automatic palletizing structure in this invention.

[0041] Label annotations: Workbench 1, Positioning column 11, Ejector pin structure 2, Ejector pin 21, Second locking element 211, Ejector pin seat 212, Mounting groove 2121, Ejector pin column 213, Locking hole 2131, Adjustment unit 214, Knob 2141, Screw 2142, First spring 215, Mounting cavity 216, Limiting hole 2161, Locking element 217, Locking element body 2171, Operating part 2172, Limiting part 2173, Second spring 218, Universal ball structure 219, Column 2191, Large ball 2192, Small ball 2193, End cap 2194, Receiving groove 2195, Small ball groove 2196, Ejector pin reciprocating frame 22, First Adjustment groove 221, second adjustment groove 226, connecting rod 222, ejector pin sliding frame 23, first locking piece 231, ejector pin bracket 24, reciprocating groove 241, reciprocating cylinder 242, piston rod 2421, conveying structure 3, lower conveyor belt 31, upper conveyor belt 32, guide plate 33, clamping gap 34, automatic stacking structure 4, stacking box 41, guide groove 411, pushing assembly 42, pushing motor 421, pushing active roller 422, pushing driven roller 423, pushing belt 424, elastic pushing plate 425, waste winding structure 5, reversing roller 51, winding roller 52, winding motor 53, dropping plate 6, dropping hole 61, positioning groove 62. Detailed Implementation

[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] like Figure 1-9The embodiment shown includes at least the following technology: a finished product separation device for a die-cutting machine, comprising a worktable 1, an ejector pin structure 2 for separating finished products from the feed strip, a conveyor structure 3 for conveying finished products, an automatic stacking structure 4 for stacking finished products, and a waste recycling structure 5. The conveyor structure 3 is installed on the upper side of the worktable 1, and the ejector pin structure 2 and the waste recycling structure 5 are sequentially arranged above the conveyor structure 3 along the feed strip's travel direction. The automatic stacking structure 4 is located on the lower side of the worktable 1 and downstream of the conveyor structure 3. The ejector pin structure 2 includes an ejector pin 21, an ejector pin reciprocating frame 22, and an ejector pin sliding frame 23. The ejector pin reciprocating frame 22 is provided with an elongated first adjustment groove 221. The ejector pin sliding frame 23 is slidably installed on the first adjustment groove 221, and its sliding direction is a first horizontal direction. The ejector pin sliding frame 23 is fixed to the first adjusting groove 221 by a first locking member 231 (in this embodiment, a bolt and nut assembly is chosen as the first locking member), thus fixing the ejector pin sliding frame 23 to the ejector pin reciprocating frame 22. A second adjusting groove 226 is provided on the ejector pin sliding frame 23, and the ejector pin 21 is slidably mounted on the second adjusting groove 226, with its sliding direction being a second horizontal direction perpendicular to the first horizontal direction. The ejector pin 21 is fixed to the second adjusting groove 226 by a second locking member 211 (in this embodiment, a bolt and nut assembly is chosen as the second locking member). This structure allows the ejector pin 21 to flexibly adjust its position in two vertical directions within the horizontal plane.

[0044] The ejector pin 21 includes an ejector pin seat 212 and a plurality of ejector pin posts 213 (three ejector pin posts 213 are used in this embodiment). The lower end of the ejector pin seat 212 has three mounting slots 2121, which are evenly distributed circumferentially. The upper end of each ejector pin post 213 can be horizontally adjusted and installed in the corresponding mounting slot 2121. An adjustment unit 214 for adjusting the extension length of the ejector pin post 213 is provided between the upper end of the ejector pin post 213 and the ejector pin seat 212. The adjustment unit 214 includes a knob 2141 and a screw 2142 that passes horizontally through the interior of the upper end of the ejector pin post 213. The portion of the screw 2142 passing through the interior of the ejector pin post 213 is a smooth rod. One end of the screw 2142 is fixedly connected to the knob 2141, and the other end is threadedly connected to the ejector pin seat 212. The first spring 215 is sleeved on the outside of the screw 2142, with its two ends abutting against the ejector pin 213 and the ejector pin seat 212, respectively. Its working principle is as follows: rotating the knob 2141 causes the screw 2142 to screw into or out of the ejector pin seat 212, thereby moving the knob 2141 closer to or away from the ejector pin seat 212. Under the elastic force of the first spring 215 and the pushing action of the knob 2141, the ejector pin 213 moves synchronously with the knob 2141, achieving stepless adjustment of the ejector pin 213 in the mounting slot. The knob 2141 is equipped with a locking assembly for locking its relative position to the ejector pin 213 after adjustment. This locking assembly includes several locking holes 2131 on the circumferential surface of the hole through which the screw passes through the ejector pin 213, a mounting cavity 216 inside the knob 2141, a locking element 217 installed in the mounting cavity 216, and a second spring 218. The locking member 217 includes a locking member body 2171, an operating part 2172, and a limiting part 2173. The mounting cavity 216 has a limiting hole corresponding to the limiting part 2173, and the mounting cavity 216 has an operating hole corresponding to the operating part 2172. For example... Figure 4As shown, in its natural state, the second spring 218 provides a preload force that pushes the locking member 217 outward, causing the limiting part 2173 to protrude from the limiting hole 2161 and extend into one of the locking holes 2131 of the ejector pin 213, thereby restricting the rotation of the knob 2141. When adjustment is required, pressing the exposed operating part 2172 causes the locking member 217 to move inward against the elastic force of the second spring 218, and the limiting part 2173 to retract from the locking hole 2131, allowing the knob 2141 to rotate. After adjustment, releasing the operating part 2172 causes the limiting part 2173 to pop out under the elastic force and automatically enter the new locking hole 2131 to restrict the rotation of the knob 2141. The lower end of each ejector pin 213 is provided with a universal ball structure 219 for contacting and pushing the finished product, including a column 2191, a large ball 2192, several small balls 2193, and an end cap 2194. The lower end of the column 2191 is provided with a hemispherical receiving groove 2195. The inner wall of the receiving groove 2195 is provided with an annular small ball groove 2196. Several small balls 2193 are received in the small ball groove 2196. A large ball 2192 is received in the receiving groove 2195 and supported by the small balls 2193. The end cap 2194 is threaded to the lower end of the column 2191. The end cap 2194 has a large ball hole in its center, through which the large ball 2192 is partially exposed, and it can rotate freely under the support of the small balls 2193.

[0045] The components driving the ejector pin structure 2 to move up and down include ejector pin supports 24 and reciprocating cylinders 242, which are mounted on both sides of the ejector pin structure 2 on the worktable 1. Each ejector pin support 24 has a vertically oriented reciprocating groove 241. Connecting rods 222 are provided on both sides of the ejector pin reciprocating frame 22 corresponding to the reciprocating grooves 241. The reciprocating cylinder 242 is located above the ejector pin support 24, and its piston rod 2421 is fixedly connected to the connecting rod 222. Its working principle is as follows: the reciprocating cylinder 242 drives the piston rod 2421 to extend and retract, which drives the connecting rod 222 to make up-and-down reciprocating linear motion under the limitation and guidance of the reciprocating groove 241, thereby driving the entire ejector pin structure 2 to rise and fall synchronously.

[0046] A blanking plate 6 is provided between the ejector pin structure 2 and the conveyor structure 3 below. The blanking plate 6 has blanking holes 61 that are adapted to the shape of the finished product to be separated. The four corners of the blanking plate 6 are provided with positioning grooves 62, and the worktable 1 is provided with positioning columns 11 corresponding to the positioning grooves 62. During installation, the positioning columns 11 are engaged in the positioning grooves 62 to achieve quick and accurate positioning and limiting of the blanking plate 6.

[0047] The conveying structure 3 includes a lower conveyor belt 31, an upper conveyor belt 32, and a guide plate 33. The lower conveyor belt 31 is located directly below the ejector pin structure 2 and is used to receive finished products falling from the discharge hole 61. The upper conveyor belt 32 is located above the lower conveyor belt 31 and only covers the part of the lower conveyor belt 31 that is not used to receive finished products, forming a clamping gap 34 between them for clamping and conveying finished products. The guide plate 33 is located at the end of the clamping gap 34 and extends downward to receive finished products coming out of the clamping gap 34 and guide the finished products to slide onto the automatic palletizing structure 4. A winding structure 5 is provided on the upper side of the conveying structure, including a deflecting roller 51 whose lower end is tangent to the upper surface of the discharge plate 6, a winding roller 52 above for winding waste material, and a winding motor 53 for driving the winding roller to rotate.

[0048] The automatic palletizing structure 4 includes a stacking box 41 and a pushing assembly 42. The stacking box 41 extends along the conveying direction of the conveying structure 3. The pushing assembly 42 includes a pushing motor 421, a pushing drive roller 422, a pushing driven roller 423, and an annular pushing belt 424 wound around the two rollers. The bottom of the stacking box 41 has a guide groove 411 along its length. On the outer surface of the pushing belt 424, a plurality of elastic pushing plates 425 are fixedly and evenly distributed along its length. The elastic pushing plates 425 can pass through the guide groove 411 and move along the guide groove 411 under the drive of the pushing belt 424. When they push the finished product in the stacking box 41 and encounter the resistance of the finished product already stacked in front, they can undergo passive bending deformation to bypass the obstacle and return to their original shape after overcoming the obstacle.

[0049] The working principle of this embodiment is as follows:

[0050] First, adjust the device. Based on the shape of the finished die-cut product, select a matching blanking plate 6 and install it onto the worktable 1 using the engagement of the positioning column 11 and the positioning groove 62. Adjust the horizontal position of the ejector pin structure 2: Loosen the first locking member 231 and the second locking member 211, move the ejector pin sliding frame 23 and the ejector pin 21, so that the universal ball structure 219 at the lower end of the three ejector pin columns 213 is roughly aligned with the appropriate force application point on the finished product, and then tighten the first locking member 231 and the second locking member 211. Fine-tune the extension length of each ejector pin column 213: Press the unlocking knob 2141 on the operating part 2172 of the locking assembly, rotate the knob 2141 so that each universal ball structure 219 is basically in a position suitable for contacting the surface of the finished product, such as multiple edge points on the upper surface of the finished product. After adjustment, release the operating part 2172 so that the limiting part 2173 extends into the limiting hole 2161 to lock the knob 2141.

[0051] During operation, the conveyor belt carrying finished products and waste materials is transported to the top of the discharge plate 6 and paused. The reciprocating cylinder 242 drives the ejector pin structure 2 to press down as a whole. The universal ball structure 219 of each ejector pin 213 simultaneously contacts the surface of the finished product and applies downward pressure, smoothly ejecting the finished product from the waste mesh frame and allowing it to pass through the discharge hole 61. The ejector pin 21 continues to descend, and the large ball 2192 of the universal ball structure 219 presses the finished product onto the surface of the lower conveyor belt 31. At this time, the finished product is clamped between the universal ball and the conveyor belt. The lower conveyor belt 31 continues to run, driving the finished product horizontally. During this process, the large ball 2192 rolls under friction, ensuring that the finished product is transported smoothly without jamming. Then, the ejector pin structure 2 moves upward, and the finished product enters the clamping gap 34 formed by the upper conveyor belt 32 and the lower conveyor belt 31, is clamped and transported to the guide plate 33, and after leaving the clamping gap 34, slides along the guide plate 33 into the inlet of the stacking box 41.

[0052] In the stacking box 41, the pusher motor 421 drives the pusher belt 424 to rotate cyclically, which in turn moves the elastic pusher plate 425 on it. When a finished product slides into the stacking box 41, an elastic pusher plate 425 moving from behind contacts its side and pushes it forward. If it encounters a stacked finished product in front, the elastic pusher plate 425 is obstructed and bends to overcome the obstacle, and then returns to its original shape to continue the cycle. In this way, the finished products are stacked tightly and neatly one by one. At the same time, the separated waste material belt is deflected by the deflector roller 51 and then wound and recycled by the winding roller 52, which also drives the unseparated material belt to the drop plate 6 to prepare for the next round of separation.

[0053] The above-described embodiments are merely one implementation of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A finished product separation device for a die-cutting machine, comprising a worktable, a conveying structure on the worktable for conveying finished products, an ejector pin structure disposed above the conveying structure for separating finished products from the feed strip, an automatic stacking structure for stacking finished products, and a waste recycling structure, characterized in that: The ejector pin structure includes an ejector pin, which includes an ejector pin seat and several ejector pin columns. The lower end of the ejector pin seat has several mounting slots corresponding to the ejector pin columns, and these mounting slots are circumferentially distributed on the ejector pin seat. The upper ends of the ejector pin columns are installed in the corresponding mounting slots, and the position of the ejector pin columns within the mounting slots is horizontally adjustable. The lower end of each ejector pin column has a universal ball joint structure for pushing the finished product. An adjustment structure is provided between the upper end of each ejector pin column and the ejector pin seat. The adjustment structure includes an adjustment unit and a first spring. The adjustment unit includes a knob and a screw that passes horizontally through the upper end of each ejector pin column. One end of the screw is fixedly connected to the knob, and the other end of the screw is threadedly connected to the ejector pin seat. The first spring is sleeved on the outside of the screw, and both ends of the first spring abut against the ejector pin column and the ejector pin seat, respectively. The knob has... A locking assembly for locking or unlocking the adjustment unit and the ejector pin; the locking assembly includes several locking holes on the ejector pin, a mounting cavity on the knob, a locking member installed in the mounting cavity, and a second spring between the locking member and the adjustment unit. One end of the second spring abuts against the locking member, and the other end of the second spring abuts against the adjustment unit. The locking member includes a locking member body, an operating part, and a limiting part. The mounting cavity has a limiting hole corresponding to the limiting part. The limiting part is partially exposed from the limiting hole and extends into the locking hole to limit the adjustment unit. The mounting cavity has an operating hole corresponding to the position of the operating part. The operating part is partially exposed from the operating hole. The second spring provides a preload force to push the limiting part out of the limiting hole and into the locking hole. Pressing the operating part can separate the limiting part from the locking hole.

2. The finished product separation device according to claim 1, characterized in that: The ejector pin structure further includes a position adjustment mechanism for adjusting the position of the ejector pin in a horizontal plane. The position adjustment mechanism includes an ejector pin reciprocating frame, an ejector pin sliding frame, a first adjustment groove, and a second adjustment groove. The ejector pin reciprocating frame is provided with a first adjustment groove, and the ejector pin sliding frame is slidably mounted on the first adjustment groove. The ejector pin sliding frame is fixed to the first adjustment groove by providing a first locking member. The ejector pin sliding frame is provided with a second adjustment groove, and the ejector pin is slidably disposed on the second adjustment groove, with the sliding direction perpendicular to the sliding direction of the ejector pin sliding frame. The ejector pin is fixed to the second adjustment groove by providing a second locking member.

3. The finished product separation device according to claim 2, characterized in that: The ejector pin structure is connected to a reciprocating assembly that drives the ejector pin to reciprocate up and down. The reciprocating assembly includes ejector pin brackets fixedly mounted on both sides of the ejector pin structure on the worktable and a reciprocating cylinder for driving the ejector pin structure to reciprocate up and down. The ejector pin brackets are provided with reciprocating grooves opened in the vertical direction. Connecting rods are provided on both sides of the ejector pin reciprocating frame corresponding to the reciprocating grooves. The reciprocating cylinder is mounted above the ejector pin brackets and is provided with a piston rod. The connecting rod is fixedly connected to the piston rod. When the cylinder is working, the piston rod drives the connecting rod to reciprocate up and down in the reciprocating groove.

4. The finished product separation device according to claim 1, characterized in that: The universal ball structure includes a column at the lower end of the ejector pin, a large ball, several small balls, and an end cap. The lower end of the column is provided with a hemispherical receiving groove, and the inner wall of the receiving groove is provided with an annular small ball groove. Several small balls are housed in the small ball groove, and the large ball is housed in the receiving groove and supported by the small balls. The end cap is threaded to the lower end of the column, and the end cap is provided with a large ball hole, through which the large ball is partially exposed.

5. The finished product separation device according to claim 1, characterized in that: A blanking plate is provided between the ejector pin structure and the conveying structure. The blanking plate has blanking holes that are adapted to the shape of the finished product. The blanking plate has positioning grooves at its four corners. The worktable has positioning columns corresponding to the positioning grooves. The positioning columns are locked in the positioning grooves to limit the blanking plate.

6. The finished product separation device according to claim 1, characterized in that: The conveying structure includes a lower conveyor belt, an upper conveyor belt, and a guide plate for guiding the finished products. The lower conveyor belt is located below the ejector pin structure and is used to receive the falling finished products. The upper conveyor belt is located above the lower conveyor belt. A clamping gap is formed between the upper and lower conveyor belts for clamping and conveying the finished products. The guide plate is located at the outlet end of the clamping gap and extends downward to the automatic palletizing structure.

7. The finished product separation device according to claim 6, characterized in that: The automatic palletizing structure includes a stacking box and a pushing assembly. The stacking box extends along the conveying direction of the conveying structure. The pushing assembly includes a pushing motor, a pushing drive roller connected to the output shaft of the pushing motor, a pushing driven roller for supporting the pushing belt, and a pushing belt wound around the pushing drive roller and the pushing driven roller. The bottom of the stacking box is provided with a guide groove. Several elastic pushing plates are equidistantly distributed on the surface of the pushing belt along the direction of the guide groove. The elastic pushing plates are used to push the finished product to move in the stacking box. The elastic pushing plates can move in the guide groove under the drive of the pushing belt. When the elastic pushing plate is obstructed, it passively deforms to avoid the obstacle and returns to its original state after the obstacle avoidance is completed.

8. The finished product separation device according to claim 6 or 7, characterized in that: The waste roll structure includes a reversing roller and a winding roller. The reversing roller is used to change the direction of the waste roll from horizontal to tangential to the winding roller. The winding roller is connected to a winding motor that drives the winding roller to rotate. The winding roller is positioned above the upper conveyor belt.

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